<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>表单</title>
    <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/bootstrap@4.4.1/dist/css/bootstrap.min.css" integrity="sha384-Vkoo8x4CGsO3+Hhxv8T/Q5PaXtkKtu6ug5TOeNV6gBiFeWPGFN9MuhOf23Q9Ifjh" crossorigin="anonymous">

</head>
<body>
    <h1>表单例子</h1>

    <form action="">
        <div>
            <span>用户名</span>
            <input type="text">
        </div>

        <div>
            <span>密码</span>
            <input type="password">
        </div>

        <div>
            <button class="btn btn-primary">登录</button>
            <button class="btn btn-outline-secondary">找回密码</button>
        </div>

    </form>

</body>
</html>